The "Bloons TD5" tower defense game has received the highest reviews of the Bloons TD series, according to review site aggregator Metacritic.com, outscoring previous editions with a meta-score of 79. "Bloons TD5" incorporates new tower designs and a new Special Agent feature for more complex and exciting gameplay.
The Bloons TD series of games is part of the genre of tower defense games that tasks the player with defending a central tower from attacking forces. In the case of the Bloons series, these attackers take the form of the balloon creatures that are the namesake of the series. First released in 2007, the Bloons series is considered one of the most popular tower defense game series as of 2015.